How do I install Gmail Gopher?

Gmail Gopher is currently in closed early access program (EAP).A demo version can be installed by anyone via the Chrome Web Store, but access to full functionality you must be part of the EAP. EAP membership is currently limited to Amplified Labs Unlimited members. Eligible? Sign up here.

Each user must install Gmail Gopher from the Add-ons gallery from any Google Sheet, or use this link, and click "Install." After installation, the tool becomes available across all of the user's Google Sheets, via the Add-ons menu.

Per-domain, one-time installation step:

Because Gmail Gopher performs very powerful actions on behalf of G Suite users, the sidebar (see below) will prompt the first super-administrative user on the domain to perform a one-time installation of the app from the G Suite Marketplace. To avoid authorization errors, we strongly recommend installing the application on the root organization unit for the domain. (Don't worry, the Add-on will NOT APPEAR for all users on the domain.)

After clicking Install Now (1. above), you'll be directed through the G Suite Marketplace installation flow.

Once the G Suite Marketplace App has been installed, you'll see the message shown below flash briefly on the screen before it goes completely blank. (This is normal, a result of the fact that the app is unlisted in the G Suite Marketplace.) Click Check Again (2. above) on the sidebar and it should acknowledge the app is now installed. In some cases, there can be a delay of a few minutes before Google's APIs identify the app as installed on the domain.